| 摘要 |
A hydraulic cylinder for water pressure test machine is provided to increase the work efficiency about the internal pressure inspection of valve. A hydraulic cylinder for water pressure test machine comprises a cylinder main body(110) which includes an oil inlet(111), an inner rod(120) which includes an oil outlet(121) to pass through the upper portion of the cylinder main body, a reducing part(130) in which an oil inlet(131) passes trough horizontally, an enlarging part(141) in order to contact with each other with the inside diameter of the cylinder main body, and a piston(140) which forms the through-hole(142) so that the external diameter of the internal road insert. |
